Pouncing machine



March 22, 1949. P. scHuLTzE 2,465,174

POUNCING MACHINE Filed April 12, 1944 7 Sheets-Sheet 1 58 INV E NTO R PAu Jah/0L zf V @QL/MH -rT RNEYS Ma'rch 225 1949. P. scHULTzE 2,465,174

POUNCING MACHINE Filed April 12, 1944 '7 sheets-sheet 2 I INVENToR PA 0LJC//a TZE RNEYSA March 22, 1949. P. scHuLTzE 2,465,174

' POUNCING MACHINE' Filed April 12, 1944 '7 sheets-sheet 4 /94 zee 9/ K//0 BY ATTO NEYS y March 22, 1949.

P. scHULTzE POUNCING MACHINE 'T Sheets-Sheet 5 Filed April 12, 1944INVENTOR Jam/72E PA UL ATTO P. SCHULTZE POUNC ING MACHINE March 22,1949.

'7 'sheets-sheet e Filed April 12, 1944 INVENTOR PAz/L Joh/az. TZE

ww M s Y E N T T A Patented Mar. ZZ, 1949 UNITED' STATES PATENT OFFICEPOUNCIN G MACHINE Pa'ul Schultze, Danbury,vClonn., assignor to DoranBrothers Incorporated," Danbury, Conn.

Application April 12, 1944, Serial'No. 530,597

14 Claims. 1

This` inventionV relates to. machines t, for. pouncing or finishing hatbodies andmoreparticularly to an improved hydraulicl operating`mechanism and its control.

An object of this invention is to provide amachine for use in nishinghat bodies which is efficient and dependable in operation and yet iss'unple, sturdy and durable in construction. Another object is toprovide an. operating mech-v anism and a control therefor which willmeet the demands of commercialuse.A vA still further Objectis to provideapparatus of the above. char. acter having a minimum of exposed parts,and, having the advantages of a hydraulic system but not `thedisadvantages thereof.` A still, further object is to provide ayhydraulic system which is, adaptable to any one of a number of differenttypes of machines andv yet which gives.. optimum results under allconditions. These andother objects will be in part obviousandfinpartpointed out below.

The invention accordingly consists in the features of construction,combinations, of' elements, arrangements of parts and inthe several.steps and relation and order of each'of the same to one or more of theothers, al1 as will' beill'us-r tratively described herein,l and thescope ofthe application oi which will be indicated in the followingclaims.

In the accompanying drawings in ,which is shown` one of the variouspossible embodiments of my invention:

Figure 1 is a side elevation `of a machine 'hav' ing-'my improvedVhydraulic mechanism installedl therein;

Figure 1a is a contour diagram of a cam; i'

Figure g is an enlarged section onthe line 2 2 of Figure 1;

Figure 3 is a section on they line 3 3v of Fig-1 ure 2.;

Figure 1 is a section on the line 4--4 of Figv`v ure 3;

Figure 5 is a horizontal section of thev liquid motor with parts brokenaway taken `on thefline 5-45 of Figure 4;

Figure 6 is aV section on the line-'I--Iiv of' Eig-@f ure` 5;

Figure '7` is an enlarged section on the line 1--1' of Figure l;

Figure 8 is a section on an enlargedy scale-.of the valve block showninFigure 3';A

Figure 9 is a section ofthe valvel block with the-valve in the reversingposition; f

Figure 1 0 is a horizontal section taken' on, the line lil-I0 of Figure8; V l

Figure 11 is a horizontal section taken on thev line II-I I of Figure 8;and,

Figure l2 is a horizontal section taken on the.l

1ine.I2.-l2 of Figure 8.

' The present invention will be described in connection with a pouncingmachine of the type shown in my United States Patent No, 2,187,250,`issued November 22, 1938, entitled Pouncing machine. Reference may alsobe madey to my prior United States Patent No. 2,105,130, issued January11 1938, entitled .Pouncing machine wherein a, similar pouncing machineis disclosed.

Referring particularly to Figure 1. of the drawings,v a pouncing machinehas a supporting columnv l0 formed by a base I I, a motor housing I2,.and a headv |31. Journaled in head I3 is a shaft 23 to the left end ofwhich is fixed a chuck III which holds a hat block I5 on which a hatbody I6 is mounted. At its right-hand end, shaft 23 has xed thereto apulley Il by means of which the shaft is rotated through a belt I8 and apulley I9 by a motor ZI. Motor 2l is mounted in housing I 2 and drivespulley I9 through suitable gears and av clutch 2c; clutch 2li isoperated by a fork 22 which fits in a groove 24 and which is carried.by'an operating shaft 25.

Thel hat body is rotatedV at a controlled speed and a pouncing tool showat the left in Figure 1 and indicated at 28 is moved into contact withthe hat body. This pouncing tool is supported by a pouncingtool assemblyand moved against andi along'the surface of the hat in the mannerdescribed in detaily in my Patent No. 2,137,250. Accordingly, on theleft-hand side of base It is mounted a bracket 38 which has a bearingcasing 3I' which provides a mounting for a pivot pin 32 (see Figure 7).Keyed to pivot pin 32 is a gear 3# which meshes with an idler` gear orpinion- 36v having teeth meshing with a rack 30. Rack 38 is slidablysupported in a guide bracket 4l] (see alsoFigure 1) which is rigidlyclamped in turnV to bracket 30. yAs will be explained more fully below;rack 38 slides back and forth in guide bracket.`vv All and this movementis transmittedv through idler gear 36 and gear 34 to pin 32 with:

vvlarelyirom the position` of rest through4 aprede-T After the forwardmovement has been completed,

there is a slight delay, referred to as the dwe1l, before the startingof the reverse movement. This dwell causes the tool to pounce the hatbody adjacent the brim in a thorough manner. For purposes of betterillustration, in Figures 1 and 7 the elements are shown at the timeduring the movement of the tool assembly when the tool is moving intocontact with the tip of the hat.

The illustrative embodiment of the present invention is apparatus formoving the pouncing tool in the above manner. This movement is impartedto the tool assembly by oscillating the rack 38 (see Figures 1 and '7).Thus, in Figure 1, when rack 38 slides to the right, forward movement isimparted to the tool assembly carrying the .tool from the position ofrest to the dwell position. Rack 38 then slides to the left and thisimparts the reversing movement to the tool assembly, returning the toolassembly to its position of rest.

At its right end rack 38 is supported by a rack guide 50 and has teethon its outer side, that is on the side away from base and these teethengage a pinion 52. Pinion 52 is keyed to a vertical shaft 54 mounted ina pair of bearings 56 fixed to base At its lower end shaft 54 carries acircular control cam 58 to be explained below. At its top end shaft 54carries a driving sprocket wheel 60 through which oscillating movementis transmitted to the shaft and thence to the tool assembly,

The oscillating movement is produced by a motive unit positioned withinbase and shown best in the sectional view of Figure 3. This motive unitis a hydraulic or liquid motor operated by oil from a pump. The pump isdriven from the top through a pulley 64 and a belt 66 which extendsaround a pair of pulleys 68 (see also Figures 2 and 7) to a pulley l0(Figure 1) on motor 2|. The oscillating movement from the motive unit istransmitted to sprocket wheel 60 through a sprocket chain 'l2 which (seeFigures 2 and 3) extends around a sprocket wheel 'I4 on the top of themotive unit.

' The motive unit includes an oil tank or casing 16 which encloses theworking parts of the unit and which also acts as an oil sump. Tank 16 isprovided at the bottom with a drain opening 18 having a removable plug19, and at the top with a llling spout 80 having a cap 8| on its top.Tank 'i6 has a top cover 82 from which the operating elements aresuspended and emersed in the body of oil in the tank, the level of oilbeing as indicated at X. This operating mechanism comprises a hydraulicmotor 84, an oil pump 86 and a valve assembly 88. At the top, acylindrical block 90 is rigidly attached to cover 82 by a plurality ofstud bolts 92 and attached to the lower end of block 90 by studs 94 is amotor block 96. The pump assembly includes a pump block 98 held in placeby studs As shown best in Figure 5, the liquid motor is in the form of avane |00 which is positioned in an annular space |02 between the innersurface of 4 block 96 and the outer surface of a mounting sleeve |04;vane |00 spans space |02 radially and axially. Positioned within annularspace |02 is a keystone-shaped block |06 which is held stationary by astud bolt |08 threaded into the bottom of the motor block; block |06closes oi space |02 radially and axially. Vane |00 is rigidly attachedby studs ||0 to sleeve |04 and sleeve |04 in turn iskeyedto a hollowshaft I2. As shown in Figure 3, shaft I2 is mounted in a pair of ballbear- ,ings |4 having a spacer sleeve |6 therebetween.

l At the top of shaft ||2 is keyed sprocket wheel |4'referred to above.Pump 86 is driven from pulley 64 by shaft ||8 which is supported at thetop in a ball bearing |20 pressed into the top of sprocket wheel '|4 andat the bottom in a pair of sleeve bearings |22 and |24.

The construction of pump is shown best in Figures 5 and 6; this pump isof the conventional gear type with a driven gear ||5 (Figure 6) mountedon a stud shaft |2| and a driving gear keyed to shaft ||8. The gearsrotate as indicated by the arrows in Figure 5 carrying oil with them,oil being drawn into pump 86 from the oil sump through passage ||9; theoil is discharged (Figure 6) under pressure through a passageway |26 inthe upper surface of the pump block upwardly through a passageway |28 inthe corner of the motor block to a horizontal passageway |30. Referringto Figure 9, at the lett-hand end, passageway |30 opens into the bottomof a cylinder |32 formed in the valve block and closed at the bottom bya sealing ring |34 and at the top by a, plate |36. Positioned withincylinder |32 is a piston |38 having a piston rod |39; piston |38 is theoperating piston for the main Valve which controls the movement of motor84 and thus the returning of the tool from the dwell position to theposition of rest.

The right-hand end of passageway |30 is open to a Vertical bore |40 inwhich is positioned a speed adjusting rod 42 which has on its lower enda tapered spiral groove or thread |44. Groove |44 extends upwardly fromthe end of rod |42 and has slowly decreasing depth and width. The upperend of groove |44 opens to a horizontal passageway I 46 which extends tothe left to the main valve chamber |48. Positioned within chamber |48 isa main valve |50 which has two piston portions |52 and |54. In Figure 9,valves |39 and |50 are shown in the reversing positlon whereas in Figure8 these valves are shown in the forward position; in Figure 8, thepassageways which normally would not appear in this figure are indicatedin dot-and-dash lines. Referring to Figure 8, immediately above thelower piston portion |54 is a passageway |56 shown in broken lines whichleads to the lower portion of chamber |02; in Figure 5 this is at theright of block |06. Referring again to Figure 8, immediately abovepiston portion |52 is a passageway |58 shown in broken lines whichleads'to the top of chamber |02 (see Figure 5) at the left of block |06;thus, with valve |50 in the position shown in Figure 8, oil from thepump flows through passageway |40 along spiral groove |44 and throughpassageway |46 to chamber |48. It then flows through passageway |56 tochamber 02. This oil under pressure causes vane |00 to swing clockwise(Figure 5); the oil ahead of vane |00 is forced o ut through passageway|58 above piston portion |52 (Figure 8) and thus to the main body ofoil. In Figure 5, vane |00 is shown in'full lines in an intermediateposition. During operation, vane |00 is moved between the two brokenline positions indicated at [a and with, respectively thatv is, Ywhenthe `too-l assembly is in the rest position vane |09 is at |000 and whenthe tool reaches the dwell position at the brim of the hat vane |80 isat |9017.

The speed of movement of the vane depends upon the amount of oil whichpasses through groove |44 and this in turn depends upon thecross-section of the groove at the point where it opens into passageway|46 as well as upon the pressure in bore |40. As pointed out above, the.cross-section of groove |44 is maximum at the bottom end of rod |42 andit decreases gradually so that the groove runs out. Thus, by moving rod|42 up and down the size of the groove at the point where it opens intopassageway |46 is changed and the amount of oil which flows through thegroove is thereby regulated.. However, it is important to maintain aconstant controlled oil pressure in bore |40 and this is done by aypressure regulating relief valve |59 closing the lower end of bore |40,shown best in Figure 4. Valve |59 has a ball |60 which is held in placebyy a ball retainer |62 pivoted at |64 upon the bottom of the valveblock. Ball retainer |62 extends to the left of pivot |64 and isattached to a pressure bar |66, the upper end of which is bored andreceives a guide rod |61 which is surrounded by a compression coilspring |68. The top. of rod |61 is rigidly attached to the lower end ofan adjusting cap |10 which is threaded in an opening in cover 182. Thelower end of adjusting cap |10 bears against the top of spring |68 andholds the spring under compression against the top of bar |66; thus, byturning cap |10 the pressure of spring |68 holding ball |60 in place ischanged. This valve acts, as a pressure release valve and releases oilwhich is received from the pump in excess of that which is used. Thisvalve also provides an accurate manner of obtaining a predetermined oilpressure in bore |40 and accurate control may thus be maintained uponthe overall speed of movement of vane |00. As ind-icated above, thespeed of movement of the tool assembly is changed as the tool movesvaround the hat and the change of speed is effected by moving rod |42 upand down thereby increasing and decreasing the eiective depth orcross-section of groove |44.

When the tool is moving between its position of rest and the position inwhich it contacts the hat body, the speed of movement may be very rapid.Accordingly, special provision is made to obtain this effect and this isin the form of a bypass valve shown in Figure 9 at the right of thespeed adjustment rod |42. This bypass Valve is provided by a verticalpassageway |14 Which is connected through a passageway |16 to the lowerend of bore |40 and which is connected through a passageway |18 to theupper end of passageway |40. Normally positioned over the end ofpassageway |18 is a plunger |80 which (see Figure 4) is slidably mountedin the cover 82 and is provided with a contact block |82. Whenunrestricted movement is desired, the pressure holding plunger |80 inthe position shown is released and this plunger moves upwardlyuncovering passageway |18. The oil then freely iiows from passageway |16through bore |14`and passageway |18 around rod |42 and throughpassageway |46 to chamber |48. Itl is thus seen that, the lifting ofplunger |80 causes the tool assembly to move at a rapid rate which isindependent of the position vof rod |42.

The pressure in bore |40 biases rodv |42 up'- wardly and its upper end(see Figure .4) is thread-i ably received in a block which is held down.by a cam |92, the position of which is changed in accordance with thespeed adjustment desired. Initially rod |42 is adjusted with respect toblock. |90 and it is locked in position by a locknut |93.,v Thereaftercam |92 is moved up and down. asdesired and rod |42 follows the movementof the cam because of the pressure within bore |40. Cam |92 is mountedon a shaft |94 which isv rotatably mounted in a pair of arms |96 and|91- (see Figure '1). Arms |96 and |91 are pivotally mounted on themachine by a shaft 290. At its outer end, shaft |94 carries an adjustingknoby 202 by means of which rod |94 is turned to adjustv the position ofcam |92. The adjustment is held by friction caused by a spring |95bearing against a collar |99 and the side of the forked upper of avertical rod 204.

Arm |96 bears against the top of block |82 and in this way holds plunger|80 in the position shown in Figure 4. However, when it is desirable. toprovide for rapid movement of the tool assembly arm |96 is raisedthereby permitting plunger |80 to move upwardly and open the bypasscircuit in the manner outlined above. Accordingly, shaft |94 isconnected at the left to a draw rod, 204 which extends downwardly to anarm 206. This arm is similar to arm |91 and is mounted on a shaft 208mounted in bearings 209 on tank- 16 which extends to the right (Figure4) and; carries a cam arm 2|0 (see also Figure 1). CamY arm 2|0 has aroller 2 |2 (see Figure 2) engaging the bottom cam surface of circularcam 58 the contour of which is indicated in broken lines at 2|4. Thecontour of this cam surface is shown schematically in Figure 1a and itis such thatx the speed of movement of the tool assembly is regulated inthe manner outlined above; that is, when the tool approaches the hatbody and again when it starts to move away from the hat body, cam arm2|0 swings clockwise (Figure 1) and this (see Figure 4) lifts arm |98 soas to open thel bypass around the control valve formed by rod |42 andgroove |44. During the time that they tool is in contact with the hatbody, the speed is controlled as desired by swinging cam arm 2|0(Figure 1) through a short arc; this in turn moves rod 204 and levers|91 and |96 and this presses rod |42 downwardly or permits it to riseVsuiiiciently to change the eiTective cross-section of groove |44 withthe result that the rate ofv flow through the groove is controlled.

Referring to Figure 4, the main valve |68 is attached at its upper endto piston rod |39 by a clamp 2 I6, and rod |39 is threaded into thelower end of a block 2 |8 and is locked by a loclnut 2 At its upper end(see Figure 3) block 2|8 is pro vided with a recess 226 which receivesthe lower rounded end 224 of a plunger arm 228. Plunger arm 220 ishingedly carried at its upper end by anoperating leve-r 222 which isclamped to a shaft 226a carried in a pair of bearings 225 and 221v inbase (see Figure 7). Referring to Figure 1, shaft 226a carries exteriorof base i! an arm 228 to which is hingedly attached the lower end of anoperating rod 230 having an adjustable collar 232 and extending througha guide block:r 234.

During the forward movement of the tool as-v sembly, the elements areheld in the position shown by a lock dog 238 pivoted to base H. and',having an extension 238. Directly beneath e: tension 238 is the end of alever and be neath lever 240 is a release rod 24.2 which extendsamsn-711i through a guide 244 and is carried at its lower end by an arm246. Arm 246 is pivoted at 248 on base and has an integral operating dog258 which extends downwardly and (see Figure 2) in the path of a stud252 carried by a bracket 254. Bracket 254 is held in position by a studbolt S (see also Figure '7) which extends through a slot 251 in thebracket 254 and is threaded into the rack. Bracket 256 is so adjustedthat when the tool reaches the position where the forward movement is tostop, stud 252 engages dog 258, swinging lever 246 counterclockwise(Figure 1). This lifts rod 242 raising lever 248 and swinging dog 236away from collar 232. Piston |38 (Figures 4, 8 and 9) is therefore freeto move upwardly and it tends to do this because of the pressure of theoil from passageway |38. This movement of piston |38 upwardly moves themain valve |58 to the position shown in Figure 9. In this position, oilfrom chamber |48 flows through passageway |58 into chamber |82 and (seeFigure 5) to the left of block |86. At this time, vane |88 is in theposition |8819 and the incoming oil swings the vane counterclockwisetoward the position |80a. This forces oil from the opposite end of thechamber through passageway |55 and the movement of the tool is reversed.

As indicated above, it is desirable to provide a dwell at the end of theforward movement of the tool and this result is obtained by merelydelaying the movement of the main valve |58 to the reversing position;that is, the reverse movement is not started until valve |58 exposes thepassageway |58 to the oil supply, and the dwell is the period of timewhich passes while the valve is moving to this position. This period oftime is regulated by restricting the outlet from chamber |32 abovepiston |38. Accordingly, the outlet from this chamber is through anopening 268 into which is positioned the tapered end of a rod 262. Theoil escapes from chamber 32 through the opening around the rod and bymoving rod 262 up and down the size of this opening is regulated. Aspointed out above, the oil pressure in bore |48, and therefore inchamber |32 beneath piston |38, i's maintained constant by the pressurerelief Valve |59. Accordingly, by providing a fixed outlet around pin262, piston |38 moves upwardly at an accurately timed rate and thelength of the dwell is thereby controlled. Rod 262 is biased upwardly bythe pressure within chamber |32 and (see Figure 4) it is held down atits upper end by a cam 264 fixed to a shaft 266 which in turn isrotatably mounted in a bracket 265 on cover 82. On the right-hand end ofshaft 256 is an adjusting knob 268, and surrounding shaft 268 is aspring 261 which holds cam 264 against the side of bracket 265 with theresult that friction holds the cam in adjusted position. Thus, when cam264 is adjusted by knob 268 a predetermined dwell period is established.In order to facilitate the passage of oil into the top of chamber |32when piston |38 is moved downwardly, a check Valve 26| is provided whichis normally held against an opening 263 by a spring 261. Valve 26| has ashank portion which is guided in a bore 269 in the valve block. Whenpiston |38 is moved downwardly, the suction created by the piston movesvalve 26| away from its seat and oil flows into chamber |32.

As shown in Figure 4, rod |42 has a central bore 218 to which a pressuregauge is attached through a nipple 212 and a flexible tube 214; such agauge is shown in Figure 1 and indicated at 216.

The machine is started by swinging bar 218 at the top of the machine ina clockwise direction" and this operates suitable motor switches (notshown) as well as clutch 28, and it also swings operating bar 288downwardly to move rod 238 to the position shown. A spring 282 normallyholds bar 288 in its upper position as shown. When it is desirable tostop the machine before the tool reaches the dwell position, the bar 284is swung counterclockwise and this raises lever 248 and releases dog 236with the result that the tool is returned to the position of rest asoutlined above.

As many possible embodiments may be made 0f the mechanical features ofthe above inven-y z umn to move from a position of rest remote from thehat body on said hat support into operative engagement with the hatbody, that improvement which includes the combination of a pump mountedwithin said column, an electric motor mounted in said column, drivingmeans including a shaft in said column connecting said motor and saidpump, a hydraulic motor mounted in said column including a rotatableelement, means to conduct fluid under pressure from said pump to saidhydraulic motor, a second shaft in said column coaxial with said firstshaft and connected to said motor element, and means forming a drivingconnection between said second shaft and said pouncing tool whereby saidhydraulic motor drives said pouncing tool upon operation of said pump.

2. Apparatus according to claim 1 wherein said pump, both of said shaftsand said hydraulic motor are disposed within a tank mounted within saidcolumn.

3. In a hydraulic operating mechanism for a hat pouncing machine, saidmachine having a column, a rotatable hat support on said column, apouncing tool rotatably mounted on said column to move from a positionof rest remote from the hat body on said hat support into operativeengagement with the hat body, that improvement which in-cludes thecombination of a pump mounted within said column, an electricmotormounted in said column, driving means including a shaft in saidcolumn connecting said motor and said pump, a hydraulic motor mounted insaid column including a rotatable element,

means to conduct fluid under pressure from saidY pump to said hydraulicmotor, a second shaft in said column coaxial with said first shaft andconnected to said motor element, means forming a driving connectionbetween said second shaft and said pouncing tool whereby said hy-Adraulic motor drives said pouncing tool upon operation of said pump, avalve for controlling the flow of hydraulic fluid from said pump to saidhydraulic motor, valve control means including a cam, and meansconnecting said cam to said driving connection whereby said cam isoperated to control said valve during the drivingoperation of saiddriving connection.

4. Apparatus according to claim 3 wherein the valve includes a pair ofports connectable with "{said hydraulic motor butwhich vare closed whenthe machine is at rest, closures for said ports adapted to move betweenopen and closed positions in relation thereto, and means connected tosaid valve control means forl controlling the movement of said closuresin response to the operation of said cam.

5. Apparatus according to claim 3 wherein said valve includes a pair ofports connectable with Said hydraulic motor but which are closed when,

the machine is at rest, closures for said 'ports f adapted respectivelyto partially open one port Aand completely open the other in timedrelation,

' whereby said hydraulic motor is driven 'at `slow and rapid rates inorder to eiect driving of said to be biased toward its open positionrelative to -imechanism including a hydraulic pump and a hydraulic motorand means forming a driving pouncing tool at slow and rapid rates, andmean-s connected to said valve control means for controlling themovement of 4said closures in response to the operation of said cam.

6. In a hydraulic operating mechanism for awa hat pouncing machine, saidmachine having a" column, a rotatable hat support on said column, apouncing tool rotatably mounted on said column to move from a ,positionof rest remote from the hat body on said hatl support into operative.ryengagement with the hat body, that improve# ment which includes thecombination of an. oil pump mounted on said column, an electric motormounted on said column, ldriving means connecting said motor and saidpump, a hydraulic motor on said column, means to conduct fluid underpressure from said pump to said motor, means forming a drivingconnection between said hydraulic motor and said pouncing tool, wherebysaid hydraulic motor drives said pouncing tool upon operation of saidpump, a valve for controlling the flow of hydraulic uid from said pumpto said hydraulic motor, valve control means including a cam, meansconnectinfr said cam to said driving connection whereby said cam isoperated to control said valve during the driving operation of saiddriving connection, said valve including a pair of ports connectalolewith said hydraulic motor but which are closed when the machine is atrest, closures for said ports adapted to move between open and closedpositions relative thereto, means constantly biasing said closurestoward their open positions while said pump is operating, and meansoperatively associated with said cam and with said 4closures for movingsaid closures against the force of sai-d biasing means when said cam isdriven by said driving connection.

'7. Apparatus according to claim 6 wherein said biasing means comprisesthe hydraulic uid, the pressure of which is exerted directly againstsaid closures, and a relief valve associated with one of said ports forbypassing the hydraulic fluid when said one port is closed.

8. In a machine of the character described, in combination, a rotatablehat support, a tool adapted to operate upon the surface of a hat mountedon said support, hydraulic driving mechanism including a hydraulic pumpand a hydraulic motor, and means forming a driving connection betweensaid motor and said tool, a valve for controlling theflow of hydraulicduid from s id pump to said hydraulic motor, a cam connected to anddriven by said driving connection, a follower operatively associatedwith said cam so as to be driven thereby, said valve including a. portedbore having a plunger movable therewithin to open and close the port insaid bore, means communicating, said bore with said pomo and said motor,said plunger being so arranged as connection between said motor and saidtool, a valve for controlling the iiow of hydraulic fluid fromV saidpump to said hydraulic motor, a cam yconnected to and driven by saiddriving connection, a follower operatively associated with said cam soas to be driven thereby, said valve including a portedbore having aplunger movable therewithin to open and close the 'port in said bore,means communicating said bore with said pump and said motor, saidplunger being so arranged as Ato be biased toward its open positionrelative to said port by the pressure of the hydraulic fluid in saidbore, means forming a driving connection between said cam yfollower andsaid plunger for moving said plunger toward its closed position againstthe pressure of said hydraulic uid, and means for relieving the pressureof the hydraulic fluid in said bore when said plunger is in its closedposition relative to said port.

10. In a machine of the character described, in combination, a rotatablehat support, a tool adapted to operate upon the surface of a hat mountedon said support, hydraulic driving mechanism including a hydraulic pumpand a hydraulic motor, and means forming a driving connection betweensaid motor and said tool, a Valve for controlling the flow of hydrauliciiuid from said pump to said hydraulic motor, a cam connected to anddriven by said driving connection, a follower operatively associatedwith said cam so as to be driven thereby, said valve including a portedbore having a plunger movable therewithin to open and close the port insaid bore, means communicating said bore with said pump and said motor,said plunger being so arranged as to be biased toward its open positionrelative to said port by the pressure of the hydraulic uid in said bore,means forming a driving connection between said cam follower and saidplunger for moving said plunger toward its closed position against thepressure of said hydraulic fluid, said valve including a second borehaving s port in communication with said pump, a second plunger in saidsecond bore under the bias of the pressure of the hydraulic iiuid,releasable means for holding said second plunger against movement bysaid hydraulic fluid, means operatively associated with said tool drive,means for releasing said releasable means when the tool driving meansreaches the end of its forward movement, whereby said second plunger maybe moved by the hydraulic fluid, and means operatively associated withsaid second plunger and with said valve for reversing the flow of uidthrough said valve to said hydraulic motor when said second plunger ismoved thereby to reverse the direction of movement o'f said tool drivingmeans.

l1. Apparatus according to claim 10 wherein the reversing meanscomprises a third plunger connected to said second plunger, said thirdplunger being slidably disposed in a third bore,

through which hydraulic uid flows to eiect reverse operation of saidmotor and accordingly of said tool driving means.

12. In a machine of the character described, in combination, a column, ahat support rotatably mounted on said column, a hat treating tool,`

means mounting said hat treating tool on said column for angularmovement relative to said hat support, means including a rack fordriving said tool, a pinion rotatably mounted on said column externallythereof and in mesh with said rack, a selectively reversible hydraulicmotor mounted Within said column, and chain and sprocket means forming adriving connection between said motor and said pinion whereby saidpinion is driven by said motor.

13. In a machine of the character described, in combination, a column, ahat support rotatably mounted on said column, av hat treating tool,means mounting said hat treating tool on said column for angularmovement relative to said hat support, means including a rack fordriving ysaid tool, a pinion rotatably mounted on said column externallythereof and in mesh with said rack, a selectively reversible hydraulicmotor mounted within said column, chain and sprocket means .forming adriving connection between said motor and said pinion whereby saidpinion is driven by said motor, means operable for controlling thedirection of ow of hydraulic uid to said motor, and means connected tosaid second-mentioned means for operating said lastmentioned means.

14. Apparatus according to claim 13 wherein said hydraulic motor andsaid controlling means are enclosed within a Huid-tight tank mountedwithin said column.

PAUL SCHULTZE.

REFERENCES CITED The following references are of record in the ille ofthis patent:

' UNITED STATES PATENTS Number Name Date 2,025,573 Collingham Dec. 24,1935 2,105,130 Schultze Jan. 11, 1938 2,137,250 Schultze Nov. 22, 1938

